CN114582285B - Drive circuit, display device and debugging method - Google Patents

Drive circuit, display device and debugging method Download PDF

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Publication number
CN114582285B
CN114582285B CN202210486615.4A CN202210486615A CN114582285B CN 114582285 B CN114582285 B CN 114582285B CN 202210486615 A CN202210486615 A CN 202210486615A CN 114582285 B CN114582285 B CN 114582285B
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display
driving
coupled
driving circuit
module
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CN202210486615.4A
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CN114582285A (en
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黄学勇
袁海江
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HKC Co Ltd
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HKC Co Ltd
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Priority to CN202210486615.4A priority Critical patent/CN114582285B/en
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Publication of CN114582285B publication Critical patent/CN114582285B/en
Priority to DE102022133419.8A priority patent/DE102022133419A1/en
Priority to US18/145,214 priority patent/US20230360596A1/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The application provides a drive circuit, display device and debugging method, drive circuit is coupled with display panel, display panel includes a plurality of display subareas, drive circuit includes a plurality of compensation modules, a plurality of compensation modules are coupled through walking the line one-to-one in a plurality of display subareas, through walking the line output voltage that the line resistance based on walking the line confirms to corresponding display subareas, this application is through configuring display panel into a plurality of display subareas, every display subarea is coupled with drive circuit through independently walking the line to can make compensation module among the drive circuit exert each display subarea's voltage diverse and confirm along with the line resistance of walking the line, thereby can be through the luminance of the control homogenization display panel of output voltage, can eliminate because the line resistance difference leads to the influence to panel luminance.

Description

Drive circuit, display device and debugging method
Technical Field
The application relates to the technical field of display, in particular to a driving circuit, a display device and a debugging method.
Background
With the development of the liquid crystal Display field, the advantages of self-luminescence, lightness and thinness of the Organic Light Emitting Display (OLED) Display technology are gradually applied to products such as TV, mobile phone and pen, and the phenomenon of uneven Display in the OLED Display in the paradigm technology needs to be solved urgently.
Disclosure of Invention
The application provides a driving circuit, a display device and a debugging method, which aim to solve the problem of uneven display in an OLED display in the example technology.
An embodiment of a first aspect of the present application provides a driving circuit, where the driving circuit is applied to a display panel, the display panel includes a plurality of display partitions, the driving circuit includes a plurality of compensation modules, the plurality of compensation modules are coupled in a one-to-one correspondence with the plurality of display partitions through wires, and the compensation modules output voltages determined based on wire resistances of the wires to the corresponding display partitions through the wires.
In a preferred embodiment, the plurality of display partitions are sequentially arranged in a direction from the display panel to the driving circuit;
the voltages output by the plurality of compensation modules to the plurality of display partitions are sequentially decreased progressively along the arrangement direction.
In a preferred embodiment, further comprising: a drive module, the drive module comprising:
the control end and the input end of the first switch unit respectively form a driving control signal input end and a data input end of the driving module;
a second switching unit having an output coupled to the plurality of compensation modules; and
and one end of the capacitor unit is coupled with the input end of the second switch unit to form a driving voltage output end of the driving module, and the other end of the capacitor unit is coupled with the output end of the first switch unit and the control end of the second switch unit.
In a preferred embodiment, the compensation module comprises: one end of each resistor unit is coupled with the corresponding display partition, the other end of each resistor unit is coupled with the driving voltage output end of the driving module, and the sum of the line resistance of the routing between each resistor unit and the corresponding display partition and the resistance value of each resistor unit is a set value or is in a set value interval.
In a preferred embodiment, the compensation module comprises:
the control end and the input end of the first switch unit respectively form a driving control signal input end and a data input end of the driving module;
a second switching unit, an output of the second switching unit being coupled to the plurality of compensation modules; and
one end of the capacitor unit is coupled with the input end of the second switch unit to form a driving voltage output end of the driving module, and the other end of the capacitor unit is coupled with the output end of the first switch unit and the control end of the second switch unit;
and the voltage of the driving voltage output end of each compensation module is determined based on the line resistance of the corresponding wire.
In a preferred embodiment, the widths of the plurality of display partitions in the arrangement direction are the same, where a line resistance of a trace between a display partition closest to the driving circuit and a corresponding compensation module is R1, and a voltage output by the compensation module corresponding to an nth display partition in the arrangement direction is K × n, where K is a first scaling factor associated with R1.
In a preferred embodiment, the compensation module comprises: the resistance unit is coupled between the corresponding display subarea and the driving voltage output end; the resistance value of each resistance unit is X Rn/I, wherein X is a second proportionality coefficient related to R, rn is a line resistance value corresponding to an nth display partition which is sequentially arranged in the direction away from the driving circuit, and I is current flowing through the resistance unit.
An embodiment of a second aspect of the present application provides a display device, including a display panel and a driving circuit, the display panel includes a plurality of display partitions, the driving circuit includes a plurality of compensation modules, the plurality of compensation modules are coupled with the plurality of display partitions through a one-to-one correspondence of a trace, and a voltage determined based on a line resistance of the trace is output to the corresponding display partition through the trace.
The embodiment of the third aspect of the present application provides a driving method of a display device, where the display device includes a display panel and a driving circuit, the display panel includes a plurality of display partitions, the driving circuit includes a plurality of compensation modules, and each compensation module is coupled to one display partition through a wire in a one-to-one correspondence; the driving method includes:
outputting different voltages based on the wire resistance of the corresponding wire through each compensation module;
and inputting each voltage to a corresponding display partition through the wiring, wherein each display partition is lighted up under the voltage.
An embodiment of a fourth aspect of the present application provides a debugging method for a display device, where the display device includes a display panel and a driving circuit, the display panel includes multiple display partitions, the driving circuit includes multiple compensation modules, and each compensation module is coupled to one display partition in a one-to-one correspondence manner through a routing; the debugging method comprises the following steps:
acquiring a line resistance parameter of each line, wherein the line resistance parameter comprises a line resistance value of each line or a proportionality coefficient forming a set correlation with the line resistance value;
generating output voltage corresponding to each wire according to the wire resistance parameters;
and debugging the output of the corresponding compensation module according to the output voltage corresponding to each wire.
According to the technical scheme, the display panel is configured into the plurality of display partitions, each display partition is coupled with the drive circuit through the independent wiring, so that voltages applied to the display partitions by the compensation modules in the drive circuit are different and are determined along with the wiring resistance of the wiring, the brightness of the OLED display panel can be uniformized through controlling the output voltage, and the influence on the brightness of the panel caused by different wiring resistances can be eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a driving circuit and a display panel in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a driving circuit and a display panel in an embodiment of the present application.
Fig. 3 is a schematic diagram of a specific structure of a driving circuit in the embodiment of the present application.
Fig. 4 is a graph showing the voltage decay of VDD in the display panel according to the embodiment of the present application.
FIG. 5 is a graph of VDD compensation voltage in a display panel according to an embodiment of the present invention.
Fig. 6 is a luminance curve obtained after the display panel is partitioned and different voltage compensations are applied in the embodiment of the present application.
Fig. 7 is a schematic diagram of a circuit relationship between the driving circuit and the display panel in the embodiment of the present application.
Fig. 8 is a schematic flowchart of a driving method of a display device according to an embodiment of the present disclosure.
Fig. 9 is a flowchart illustrating a debugging method of a display device in an embodiment of the present application.
Fig. 10 is a flowchart illustrating a specific example of a debugging method in the embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. It should be noted that the driving circuit, the display device, and the debugging method disclosed in the present application can be used in the field of display technology, and can also be used in any field other than the field of display technology.
Example 1
Fig. 1 is a schematic structural diagram of a driving circuit and a display panel provided in an embodiment of the present application, where the driving circuit 1 provided in this embodiment is configured to perform display driving on a display panel 2 of a plurality of display partitions (A1, A2, A3, A4, and A5), that is, a driving voltage is input to each display partition through a routing line, the passing current of an organic light emitting material in the display partition is affected by the level of the driving voltage, and further, the higher the driving current is, the higher the light emitting luminance of the organic light emitting material is.
As shown in fig. 2, the driving circuit in this embodiment includes a plurality of compensation modules 11, each of the compensation modules 11 is coupled to a corresponding display partition through a trace, and the compensation module 11 outputs a voltage determined based on a line resistance of the trace to the corresponding display partition through the trace. The embodiment can enable the voltages applied to each display partition by the compensation module in the driving circuit to be different and determined along with the line resistance of the wiring, so that the brightness of the OLED display panel can be uniformized by controlling the output voltage, and the influence on the brightness of the panel caused by different line resistances can be eliminated.
Illustratively, the display panel is divided into a display partition A1, a display partition A2, a display partition A3, a display partition A4 and a display partition A5, if the display partition A1 is connected to a trace 1 (not shown), the display partition A2 is connected to a trace 2 (not shown), the display partition A3 is connected to a trace 3 (not shown), the display partition A4 is connected to a trace 4 (not shown), and the display partition A5 is connected to a trace 5 (not shown), the traces 1 to 5 are all coupled to a driving circuit, the traces 1 to 5 are respectively coupled to a compensation module, and each compensation module outputs a voltage through the trace.
Illustratively, the wires of the multiple display partitions are based on wire requirements or limitations, and the wire resistances of the wires may be different from each other, for example, in a certain scenario, one of the display partitions may increase the diameter of the cross section of the wire to improve the toughness due to the structural requirement, and the other display partition may decrease the diameter of the cross section of the wire to reduce the occupied space of the wire due to the space limitation, and it can be understood that the wires of the wires with different cross sections have different wire resistances, and the wires of the wires with different materials have different wire resistances.
Exemplarily, the application provides a folding screen, and the junction between display subareas 2 and 3 is the "crease" of folding screen, and the toughness of the wire of display subareas 2 and 3 needs to be strengthened at this moment, and then under the condition that all wire materials are the same, the line resistance of display subareas 2 and 3 can be reduced, and the brightness thereof is higher under the same driving voltage.
It can be understood that, in the above example, the display panel is divided into five display partitions, and it is obvious to a person skilled in the art that the above embodiment is only used as an example, the number of the display partitions in the present application may be two, three, or ten, and the like, and the person skilled in the art may arbitrarily set the display partitions based on actual situations and accuracy considerations, and details are not described herein.
It can be understood that, in the present application, each compensation module is coupled to one display partition in a one-to-one correspondence manner through a trace, that is, one compensation module is coupled to one display partition through an independent trace, and the compensation module forms a unique mapping relationship with the independent trace and the display partition.
It is obvious to one skilled in the art that "coupling" in the present application may be a direct or indirect electrical connection, for example, a and B are coupled, and then a and B are directly electrically connected, or a and B are electrically connected through C, which is not limited in the present application.
The output voltage of each compensation module in the present application is determined based on the line resistance of the corresponding trace, and as a simple example, the embodiment of the present application can provide a higher voltage when the line resistance is small, and provide a lower voltage when the line resistance is large, thereby equalizing the brightness of each display partition.
It is well known in the art that in a specific scenario, determining the output voltage based on the wire-bound resistance is not implemented in a way that hampers the technical effect, for example, after referring to the present application, in order to achieve the technical effect of brightness uniformity, a lower voltage is not provided inversely when the wire-bound resistance is small, and a higher voltage is provided when the wire-bound resistance is large, so the output voltage of the present application is determined based on the wire-bound resistance, but is not in any way applicable to any rule, but is determined based on a rule within the knowledge of the skilled person.
The driving circuit provided by the embodiment of the present invention is used for performing display driving on an OLED display panel having at least two (i.e., a plurality of) panel partitions, that is, the driving circuit is suitable for the OLED display panel, and a light emitting structure (OLED device) of the OLED display panel includes: the light emitting device comprises a Cathode (Cathode), an Electron Injection Layer (EIL), an Electron Transport Layer (ETL), a light Emitting Layer (EL), a Hole Transport Layer (HTL), a Hole Injection Layer (HIL) and an Anode (Anode).
In an alternative embodiment, the plurality of display partitions may be arranged in a direction toward the driving circuit, that is, in a direction from the display panel to the driving circuit, and the output voltage of each display partition coupled to the compensation module decreases in the direction toward the driving circuit. As shown in fig. 2, in the driving architecture of the panel, the line resistance units at the principle panel end are gradually increased, and the driving voltage is gradually decreased due to the dc attenuation, so the display partitions can be arranged along the direction toward the driving circuit, and thus, as the in-plane line resistance of each display partition is continuously increased, the configuration direction of the display partitions is arranged along the direction of increasing or decreasing the line resistance, so on one hand, the same display partition can be driven by the same voltage to keep the brightness uniform, while different display partitions can perform voltage control due to the line resistance rule thereof, and in the direction toward the driving circuit, the output voltage of each display partition coupled to the compensation module is decreased gradually, thereby eliminating the influence of the line resistance.
In specific implementation, as shown in fig. 3, the driving circuit further includes: a drive module, the drive module comprising: a first switch unit T1, a control terminal (pin a1 of T1) of which is coupled to the driving control signal input terminal Scan, and an input terminal (pin b1 of T1) of which is coupled to the Data input terminal Data; a second switch unit T2, having a control terminal (pin a2 of T2) coupled to the output terminal (pin C1 of T1) of the first switch unit, an input terminal (pin b2 of T2) coupled to the driving voltage output terminal Vdd, and an output terminal (pin C2 of T2) coupled to each compensation module (not shown in the figure); and a capacitor unit C, one end of which is coupled to the output trace of the driving voltage output terminal Vdd, and the other end of which is coupled to the trace between the output terminal (pin C1 of T1) of the first switch unit and the control terminal (pin a2 of T2) of the second switch unit.
It can be understood that, in fig. 3, the control terminal (pin a1 of T1) and the input terminal (pin b1 of T1) of the first switch unit T1 respectively constitute the driving module driving control signal input terminal Scan and the Data input terminal Data, and one end of the capacitor unit C is coupled to the input terminal (pin b2 of T2) of the second switch unit T2 to constitute the driving voltage output terminal Vdd of the driving module.
In the present embodiment, the driving module is obtained based on the improvement of the driving circuit in the example technology, the driving voltage output terminal is the driving voltage in the example technology, and the compensation module is coupled between the driving module and the display panel under the structure, that is, the compensation module is coupled between the pin c2 of T2 in fig. 3 and the OLED.
Illustratively, the resistor unit may also be coupled to a line on which the driving voltage output terminal is located, that is, the compensation module is coupled to an output line at a Vdd terminal in fig. 3 under this structure, and the output line is further coupled to the capacitor C and is coupled to the b2 terminal of the second switch unit T2, so that the compensation module may be disposed on the FPCB, which provides a variety of options for disposing the compensation module.
Furthermore, in an alternative embodiment, the compensation module as described in fig. 7 comprises: the resistance units (R1, R2, R3, R4 and R5) are coupled on the routing lines between the corresponding display subareas and the driving voltage output ends; the sum of the resistance unit and the wire resistors (R1 ', R2', R3', R4' and R5) of the corresponding wires is a set value or in a set value interval. This embodiment is through the line resistance that each shows the subregion correspondence with the resistance unit balance of compensation module, and then through inserting different resistance unit, cooperates with the line resistance to carry out the partial pressure to same drive voltage to the voltage uniformity of inputing to every display subarea.
In an embodiment not shown in the drawings, a plurality of driving voltage output terminals may be provided, and this embodiment may directly adjust the terminal voltage values of the driving voltage output terminals, so that a resistance unit is not required to be provided, and in this embodiment, each of the compensation modules includes: a driving voltage output terminal, a data input terminal and a driving control signal input terminal; a first switch unit, a control terminal of which is coupled to the driving control signal input terminal, and an input terminal of which is coupled to the data input terminal; a control end of the second switch unit is coupled with the output end of the first switch unit, an input end of the second switch unit is coupled with the driving voltage output end, and an output end of the second switch unit is coupled with each driving module; one end of the capacitor unit is coupled to the output wiring of the driving voltage output end, and the other end of the capacitor unit is coupled to the wiring between the output end of the first switch unit and the control end of the second switch unit; and the voltage of the driving voltage output end of each compensation module is determined based on the line resistance of the corresponding routing line.
It is understood that the first switch unit and the second switch unit in the embodiment not shown in the above figures and the connection relationship between the first switch unit and the second switch unit and the capacitor unit are similar to the embodiment of fig. 3, and are not specifically described here.
As shown in a VDD voltage attenuation diagram shown in fig. 4, due to the existence of the line resistance, the longer the trace of the display partition farther from the driving circuit in a conventional scenario is, the larger the line resistance is, and therefore the lower the VDD input to the display partition is, as shown in a voltage curve of the output voltage of the compensation module shown in fig. 5, fig. 6 shows the voltage curve of each display partition after the attenuation curve shown in fig. 4 is supplemented with the compensation voltage curve shown in fig. 5, it can be seen that, through the compensation method in the embodiment of the present application, the luminance of each display partition can be made uniform, so that the display panel is optimized.
In this embodiment, in combination with the attenuation map, a specific determination manner of the output voltage of the compensation module is provided, in this embodiment, the width of each display partition in the direction toward the driving circuit is the same, the wire resistance of the trace between the display partition closest to the driving circuit and the corresponding compensation module is R1, and the output voltage of the compensation module corresponding to the nth display partition in the arrangement direction is K n * n, wherein K n Is a first scaling factor corresponding to the nth display partition and associated with R1. Go through the bookThe specific determination mode of the output voltage of the compensation module in the embodiment can be seen from a VDD attenuation curve, the longer the wiring (the farther from a driving circuit), the larger the voltage attenuation is, and the proportional coefficient related to R1 is set, so that each wire resistance does not need to be measured, the problem of difficult measurement caused by inconvenient measurement of the wire resistance is avoided, and the problem of difficult measurement caused by inconvenient measurement of the wire resistance is solved due to the fact that K is n Having a correlation with R1, in combination with the same width of each partition, assuming that each Kn is the same, it corresponds to R2 being twice R1, R3 being three times R1, and so on, so replacing R1 with Kn, it is only necessary to set the compensation voltage of the first display partition to K 1 Multiple of (2), the second compensation voltage for the display sub-area being 2K 1 By analogy, the compensation voltage of each partition can be obtained without measuring R1 to R5.
Further, can obtain optimal compensating voltage through setting up reasonable K value, exemplarily, can detect display screen luminance through electronic equipment, then carry out the regulation of final luminance through adjusting the K value, when display screen luminance is too high, through reducing the K value, can reduce output voltage, and then the geometric proportion reduces every luminance that shows the subregion, keeps whole display screen luminance homogenization.
In this embodiment, as shown in fig. 7, the compensation module includes: the resistance unit is coupled on the routing between the corresponding display subarea and the driving voltage output end; the resistance value of each resistance unit is X Rn/I, wherein X is a second proportionality coefficient, rn is a line resistance value corresponding to the nth display partition area which is sequentially arranged along the direction far away from the driving circuit, and I is current flowing through the resistance unit. In this embodiment, the resistance of the resistor unit of the compensation module is X × Rn/I, so that, through setting of the proportional coefficient X, the purpose of outputting different driving voltages can be achieved under the condition of fixing the resistor unit, for example, the larger the setting of X is, the larger the resistance of the resistor unit is, the larger the corresponding driving voltage is, or when the resistance of the resistor unit is fixed, the larger X is, the smaller the current flowing through the resistor unit is, and at this time, according to the definition of V = I (Rn + resistance of the resistor unit), the fixed resistance of Rn + resistor unit is, and the smaller the driving voltage is.
For example, as shown in fig. 7, the resistance units in the compensation module are R1, R2, R3, R4 and R5, correspondingly, the trace resistances (i.e. the in-plane resistance units in the figure) corresponding to the display partitions are R1', R2', R3', R4' and R5', the voltage output by the compensation module corresponding to R1 is VDD1, the voltage output by the compensation module corresponding to R2 is VDD2, and by analogy, VDD3, VDD4 and VDD5 are output, it can be seen that VDD1-VDD5 are all obtained by VDD driving voltage, and the magnitudes of VDD1 to VDD5 are obtained based on the ratios of the compensation resistance units on the corresponding traces and the in-plane resistance units, for example, the magnitude of VDD1 is: the other output voltages of VDDR 1/(R1 + R1') are not described in detail.
Further, in an embodiment preferred by the application, automatic adjustment based on actual conditions may be implemented, for example, a Micro Controller Unit (MCU) is disposed in the driving circuit, the MCU may store part of the calculation logic and the K value or the X value, and the MCU may acquire the driving voltage value and the luminance value of each display partition in a synchronous or asynchronous manner, and in combination with a daily scene, when it is identified that the luminance value is too high, the driving voltage may be reduced in a manner of reducing the K value, which is not described herein again.
It can be seen that, according to the display panel, the display panel is configured into the plurality of display partitions, and each display partition is coupled with the driving circuit through the independent routing, so that voltages applied to the display partitions by the compensation module in the driving circuit are different and determined along with the line resistance of the routing, the brightness of the OLED display panel can be uniformized through the control of the output voltage, and the influence on the brightness of the panel caused by different line resistances can be eliminated.
Example 2
In an embodiment of the present application, a display device includes a display panel and a driving circuit, the display panel includes a plurality of display partitions, the driving circuit includes a plurality of compensation modules, each compensation module corresponds to one display partition one-to-one, each display partition is coupled to the corresponding compensation module through a wire, and a voltage output by each compensation module is determined based on a wire resistance of the corresponding wire.
In specific implementation, the display device provided in the embodiment of the present invention may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
It can be seen that, according to the display panel, the display panel is configured into the plurality of display partitions, and each display partition is coupled with the driving circuit through the independent routing, so that voltages applied to the display partitions by the compensation module in the driving circuit are different and determined along with the line resistance of the routing, the brightness of the OLED display panel can be uniformized through the control of the output voltage, and the influence on the brightness of the panel caused by different line resistances can be eliminated.
Example 3
Fig. 8 is a driving method of a display device according to an embodiment of the present application, where the display device includes a display panel and a driving circuit, the display panel includes a plurality of display partitions, the driving circuit includes a plurality of compensation modules, each compensation module corresponds to one display partition, and each display partition is coupled to a corresponding compensation module through a trace; the driving method includes:
s11: outputting different voltages based on the wire resistance of the corresponding wire through each compensation module;
s12: and inputting the voltages to the corresponding display partitions through the wires, wherein each display partition is lightened under the voltage.
It can be seen that, this application is through configuring display panel into a plurality of display subareas, and every display subarea is coupled with drive circuit through independently walking the line to can make the compensation module among the drive circuit exert the voltage diverse at each display subarea, through walk the line with each voltage input to corresponding display subarea in order to light up the display subarea, thereby can be through the luminance of the control homogenization OLED display panel of output voltage, can eliminate because of the different influence that leads to the panel luminance of line resistance.
Example 4
Fig. 9 is a debugging method of a display device in an embodiment of the present application, where the display device includes a display panel and a driving circuit, the display panel includes a plurality of display partitions, the driving circuit includes a plurality of compensation modules, each compensation module corresponds to one display partition, and each display partition is coupled to a corresponding compensation module through a trace; the debugging method comprises the following steps:
s21: obtaining a wire resistance parameter of each wire, wherein the wire resistance parameter comprises a wire resistance value of each wire or a proportionality coefficient forming a set correlation with the wire resistance value;
s22: generating output voltage corresponding to each wire according to the wire resistance parameters;
s23: and debugging the output of the corresponding compensation module according to the output voltage corresponding to each wire.
Specifically, referring to the embodiment shown in fig. 10, in the specific debugging, the debugging process in fig. 10 is to determine VDD1,2,3, etc. by brightness, and determine the VDD voltage when L1= L2= L3= L0, so as to eliminate the influence that X or K is not easily measured.
It can be seen that in the embodiment, by using the debugging method, the output voltage of each compensation module can be debugged to the required voltage value before use, and the voltage value is used as the output of each compensation module, so that when the compensation module is used next time, because each compensation module is debugged, the display partitions are directly driven, and then each display partition is lightened, the effect of uniformizing the brightness of the OLED display panel is achieved, and the influence on the brightness of the panel caused by different line resistances can be eliminated.
It should be noted that, the driving circuit embodiment, the display device embodiment, and the driving method and the debugging method thereof provided in the embodiment of the present invention may all be mutually referred to, and the embodiment of the present invention does not limit this. The steps of the method for manufacturing a display panel according to the embodiments of the present invention can be increased or decreased according to the circumstances, and any method that can be easily conceived by a person skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and therefore, the details are not repeated.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (8)

1. A driving circuit is applied to a display panel, the display panel comprises a plurality of display partitions, the driving circuit comprises a plurality of compensation modules, each compensation module is coupled with one display partition in a one-to-one correspondence mode through a wire, and the compensation modules output voltages determined based on wire resistances of the wires to the corresponding display partitions through the wires;
further comprising: a drive module, the drive module comprising:
the control end and the input end of the first switch unit respectively form a driving control signal input end and a data input end of the driving module;
a second switching unit, an output of the second switching unit being coupled to the plurality of compensation modules; and
one end of the capacitor unit is coupled with the input end of the second switch unit to form a driving voltage output end of the driving module, and the other end of the capacitor unit is coupled with the output end of the first switch unit and the control end of the second switch unit;
the plurality of display partitions are sequentially arranged in a direction from the driving circuit to the display panel; the line resistance of the routing between the display partition nearest to the driving circuit and the corresponding compensation module is R1, and the voltage output by the compensation module corresponding to the nth display partition in the arrangement direction is K n * n, wherein K n Is a first scaling factor corresponding to the nth display partition and associated with R1;
the driving circuit is further provided with an MCU, the MCU is used for detecting the brightness of the display screen, and the coefficient Kn is adjusted according to the brightness of the display screen so as to ensure the uniformity of the brightness of the display screen.
2. The drive circuit according to claim 1,
the voltages output by the plurality of compensation modules to the plurality of display partitions are sequentially increased in the arrangement direction.
3. The driving circuit of claim 1, wherein the compensation module comprises: one end of each resistor unit is coupled with the corresponding display partition, the other end of each resistor unit is coupled with the driving voltage output end of the driving module, or the resistor units are coupled on the wires where the driving voltage output ends are located, and the sum of the line resistance of the wires between the resistor units and the corresponding display partitions and the resistance value of the resistor units is a set value or is within a set value range.
4. The driving circuit of claim 1, wherein the compensation module comprises:
the control end and the input end of the first switch unit respectively form a driving control signal input end and a data input end of the driving module;
a second switching unit having an output coupled to each driving module; and
one end of the capacitor unit is coupled with the input end of the second switch unit to form a driving voltage output end of the driving module, and the other end of the capacitor unit is coupled with the output end of the first switch unit and the control end of the second switch unit;
and the voltage of the driving voltage output end of each compensation module is determined based on the line resistance of the corresponding wire.
5. The driving circuit of claim 1, wherein the compensation module comprises: the resistance unit is coupled between the corresponding display subarea and the driving voltage output end; the resistance value of each resistance unit is X Rn/I, wherein X is a second proportionality coefficient related to R1, rn is a line resistance value corresponding to an nth display partition which is sequentially arranged in the direction away from the driving circuit, and I is current flowing through the resistance unit.
6. The drive circuit according to claim 1, wherein widths of the plurality of display sections in the arrangement direction are the same.
7. A display device, comprising a display panel and a driving circuit, wherein the display panel comprises a plurality of display partitions, the driving circuit comprises a plurality of compensation modules, the plurality of compensation modules are coupled with the plurality of display partitions in a one-to-one correspondence manner through wires, the compensation modules output voltages determined based on wire resistances of the wires to the corresponding display partitions through the wires, and the driving circuit further comprises: a drive module, the drive module comprising:
the control end and the input end of the first switch unit respectively form a driving control signal input end and a data input end of the driving module;
a second switching unit, an output of the second switching unit being coupled to the plurality of compensation modules; and
one end of the capacitor unit is coupled with the input end of the second switch unit to form a driving voltage output end of the driving module, and the other end of the capacitor unit is coupled with the output end of the first switch unit and the control end of the second switch unit;
the display partitions are sequentially arranged in the arrangement direction from the driving circuit to the display panel; the line resistance of the routing between the display partition nearest to the driving circuit and the corresponding compensation module is R1, and the voltage output by the compensation module corresponding to the nth display partition in the arrangement direction is K n * n, wherein K n Is a first scaling factor corresponding to the nth display partition and associated with R1;
the driving circuit is further provided with an MCU, the MCU is used for detecting the brightness of the display screen, and the coefficient Kn is adjusted according to the brightness of the display screen so as to ensure the uniformity of the brightness of the display screen.
8. The debugging method of the display device is characterized in that the display device comprises a display panel and a driving circuit, wherein the display panel comprises a plurality of display partitions, the driving circuit comprises a plurality of compensation modules, and each compensation module is coupled with one display partition in a one-to-one correspondence manner through wiring; the debugging method comprises the following steps:
obtaining a wire resistance parameter of each wire, wherein the wire resistance parameter comprises a wire resistance value of each wire or a proportionality coefficient forming a set correlation with the wire resistance value;
generating output voltage corresponding to each wire according to the wire resistance parameters;
the plurality of display partitions are sequentially arranged in a direction from the driving circuit to the display panel; debugging the output of the corresponding compensation module according to the output voltage corresponding to each wire; the line resistance of the routing between the display partition nearest to the driving circuit and the corresponding compensation module is R1, and the voltage output by the compensation module corresponding to the nth display partition in the arrangement direction is K n * n, wherein K n Is a first scaling factor corresponding to the nth display partition and associated with R1;
the driving circuit is further provided with an MCU, the MCU is used for detecting the brightness of the display screen, and the coefficient Kn is adjusted according to the brightness of the display screen so as to ensure the uniformity of the brightness of the display screen.
CN202210486615.4A 2022-05-06 2022-05-06 Drive circuit, display device and debugging method Active CN114582285B (en)

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